Machine for applying sealing compound to container ends



. Dec. 18, 1945. P. E. PEARSON ET AL 2,391,341

MACHINE FOR APPLYING SEALING COMPOUND T0 CONTAINER ENDS- Filed Nov. 25,1945 2 Sheets-Sheet 1 'Dec. 18, 1945. P. E. PEARSON ET AL MACHINE FORAPPLYING SEALING COMPOUND TO CONTAINER ENDS 2 Shets-Sheet 2' Filed Nov.23, 1943 Patented Dec. 18, 1945 ium'reo STATES e TEN OFFICE Paul E.Pearson and Alfred Treff, Chicago, 111., I assignors to ContinentalOanCompany, Inc., New York, N. -Y., a corporation of New York ApplicationNovember 23, 1943'. Serial No. 511,458

2 Claims. (01. 113 -8 The invention relates to new and usefulimprovementsin a machine, for applying a sealing compound to the channelof a container end, and

more particularly a container end which is ir-- Straight sides androunded corners or an end which is oval in contour. 7

An object of the invention is to provide a machine which is adapted toflow a measured amount of sealing compound into the channel of the canend which is facing upwardly.

A further object of the invention is to provide a machine of the abovetype wherein the can end is clamped against its support by a channelengaging member shaped to conform to the channel of the can end anddisposed so a to determine the outer limits of the coating as applied tothe channel. l

A still further object of the invention is to provide a machine of theabove type wherein a measured amount of sealing material is caused toflow down the inner wall of the channel engaging member into the channelof the can end for coating the same. v

Another object of the invention is to provide a machine of the abovetype with a means for stripping the sealing material from the inner wallof Figure 1 is a view partly in section and'partly in side elevationshowing more or less diagrammatically the improved machine for applyinga compound to the channel of a can end;

Figure 2 is a plan view of the same; Figure 3 is a detail in'sectionshowin the can end clamped by the channel engaging member against thesupport therefor with the stripper in its lowered position; Figure 4 isa view similar to the stripper as raised so that the sealing compound inthe measuring pocket is permitted to flow along the inner wall of thechannel engaging member into the channel of the can end; and

Figure 5 is a view similar to Fig. 4, but with the stripper lowered andthe sealing compound stripped from the inner wall of the channelengaging member into the channel of the can end. The machine forapplying the compound to the channel of the can end includes asupporting irame I in which is mounted a reciprocating support 2carrying a can end supporting pad 3. The supporting member 2 is mountedin a sleeve 2a carried by the frame. This supporting member 2 isconnected by means of a bolt 5 to a lever 6 Fig. 3, but showing whichinturn is pivoted at "I to a sup-porting bracket. The lever 6 is slottedas indicated at 5a, and the bolt 5 passes through said slot. 7

Any suitable mechanism may be provided for placing the can ends on thepad of the machine with the channel facing upward and for removingthes-ame after the sealing compound has been applied thereto. The lever6, when swung in a clockwise direction, will raise the can end to acoating position, and when swung in the opposite direction, the can endwill be lowered to a position where it may be removed from thesupporting pad. The pad is provided with a collar 30. which rests on theupper end of the sleeve 2a when in lowered position.

Mounted on the frame directly above the supporting pad for the can endis a cylinder 8 which is secured to the frame by suitable bolts 9. Saidcylinder 8 is provided at the lower inner edge thereof with a dependingchannel engaging member III. This channel engaging member I 0 is shapedto conform to the channel of the can end which is to be coated. Saidchannel engaging member, when the can end is raised with the pad 3,enters the channel at the outer regions thereof, and, itserves twofunctions: first, it clamps the end against the pad and it also removesany bends Second. the channel engaging member will serve to limit thearea of the channel to which coating is appliedand insure that thecoating shall be flowed against and cover the inner wall of the channel.I

A short distance above this channel engaging member is a measuringpocket I I. Disposed within the cylinder 8 is a piston I2 which isadapted to beraised and lowered by a lever mechanism.

Said lever mechanism includes a bar I3 mounted into a bracket 22 carriedby the frame. The bolt has a thread extending throughout the lengththereof, and a stop nut 23 is adjustably mounted on the bolt and servesas a means for limiting the upward movement of the piston. There is asimilar bolt 24 threaded into a bracket 25 carried by the frame which islikewise provided with a stop nut 26. By adjusting this nut 26, thedownward movement of the piston can be regulated. The piston I2 isprovided with a central passage 21 which connects with radial passages28, 28. A pipe 29 is threaded into the upper end of the piston andserves as a means for supplying a sealing compound to the chamber formedby the passages 2'1 and 28. There is a channel 30 extending around thepiston which connects the radial passages 28 so that the compoundflowing into the passages 28 will fill "this channel 30. When the partsare positioned as shown in Fig, 3, the sealing compound will flow fromthe channel 30 into the measuring pocket H and fill .the same, .and whenthe piston is raised to the position shown .in Fig. 4, then the lowerend of the piston is above the lower end of the pocket and the -sealingcompound in the pocket will flow therefrom and. along the inner wall ofthe channel member into the channel -.of the end. The piston has adepending annular stripping member 3|, the under-face of which ispreferably slightly concaved as indicated at :32.

The operation of the compound applying machine will be brieflydescribed. The piston is moved to the lower end of its stroke,uncovering the measuring pocket so that it .is supplied with the coatingcompound. At this time, the pad is raised so as to bring the can endinto contact with the channel engaging member I0. This channel engagingmember is shaped 'to conform to the channel of the can end. The pad hasa raised part which is also shaped to conform to thechannel of the canend and serves .as a positioning means so that the can end is properlypositioned to receive this channel engaging member to. When the channelengaging member 10 contacts with the end, the end will be pressed firmlyagainst the .pad, thus removing any unevenness in the bottom of thechanneldue'to warping of the end. In other words, asalready noted, thbottom of the channel is leveled so .as to insure that a uniform coatingof a flowing compound can be obtained. After the end is firmly clampedagainst the channel engaging member, then the piston is raised to theposition shown in Fig. 4. This uncovers the pocket and permits thesealing compound indicated at S to flow along the inner wall of thechannel engaging member and into the channel. The channel engagingmember defines the outer limits of the channel area'to be coated andinsures that the sealing material will be placed well back against theshoulder of the can end. After the sealing compound has flowed bygravity'outof the measuring pocket, thenthe piston is lowered and thestripper 3| will strip the sealing material adhering to the inner wallof the channel member and force it intothe channel of the can end. Thisstripper is limited in its downward movement as clearly shown in Fig. 5

of th drawings. The downward movement may be so regulated that thesealing material discharged into the channel will be forced well backagainst and up along the heel or inner channel wall. After the stripperhas been lowered in the mannerstated, then the pad is lowered and thecan .end with the coating applied thereto is removed from the pad.

It is obvious that many changes in the details of construction may bemade without departing from the spirit of the invention as set forth inthe appended claims.

Weclaim:

"1. A machine for applying a sealing compound to the channel of a canend comprising a support for the can end, a channel engaging memberhaving a cylindrical inner wall and a projecting portion at its lowerend adapted to contact with the can end and clamp said end against thesupport therefor, said channel engaging member having an annular recessin said inner face forming a measuring pocket for the sealing compound,a piston movable along said cylindrical wall of the channel engagingmember, said channel engaging. member having a supply chamber for thesealing compound above said piston, said piston being movable relativeto the recess so as to "connect the recess with the supply chamber onthe down stroke of the piston-and uncover the recess onthe upstroke ofthe piston whereby the measured amount of sealing compound in the recesswill flow along the inner wall -of-the channel engaging member into thechannel of the can'end.

2. A machine for applying a sealing compound to thecharmelcf a can endcomprisingasupport for the can end, a channel engaging member having acylindrical inner wall and a projectin portion at its lower end adaptedto contact with the can end in the outer region of the channel and clampsaid end against the support therefor, said channel engaging memberhaving an annular recess in said inner face forming a measuring pocketfor the sealing compound, a piston movable along said channelengagingmember having a supply chamber for'the sealing compound'above saidpiston, said piston being movable relative to the recess so as toconnect the recess with the supply chamber on the down stroke of thepiston and uncover the recess on the upstroke of thepiston whereby themeasured amount of sealing com pound in the recess will flow along theinner wall of the channel engaging member into the channel of the canend, said piston having a stripper depending therefrom and adapted tostrip the sealing compound adhering to the inner wall of the channelengaging member for forcing the coilnpound into the uncovered portion ofthe chan; ne

PAUL 'E. PEARSON. ALFRED 'TREFF.

